gecko-dev/dom/filesystem/Directory.cpp

238 строки
5.6 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/Directory.h"
#include "GetDirectoryListingTask.h"
#include "GetFilesTask.h"
#include "WorkerPrivate.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsString.h"
#include "mozilla/dom/DirectoryBinding.h"
#include "mozilla/dom/FileSystemBase.h"
#include "mozilla/dom/FileSystemUtils.h"
#include "mozilla/dom/OSFileSystem.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_CLASS(Directory)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Directory)
if (tmp->mFileSystem) {
tmp->mFileSystem->Unlink();
tmp->mFileSystem = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Directory)
if (tmp->mFileSystem) {
tmp->mFileSystem->Traverse(cb);
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Directory)
NS_IMPL_CYCLE_COLLECTING_ADDREF(Directory)
NS_IMPL_CYCLE_COLLECTING_RELEASE(Directory)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Directory)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
/* static */ bool
Directory::WebkitBlinkDirectoryPickerEnabled(JSContext* aCx, JSObject* aObj)
{
if (NS_IsMainThread()) {
return Preferences::GetBool("dom.webkitBlink.dirPicker.enabled", false);
}
// aCx can be null when this function is called by something else than WebIDL
// binding code.
workers::WorkerPrivate* workerPrivate =
workers::GetCurrentThreadWorkerPrivate();
if (!workerPrivate) {
return false;
}
return workerPrivate->WebkitBlinkDirectoryPickerEnabled();
}
/* static */ already_AddRefed<Directory>
Directory::Constructor(const GlobalObject& aGlobal,
const nsAString& aRealPath,
ErrorResult& aRv)
{
nsCOMPtr<nsIFile> path;
aRv = NS_NewLocalFile(aRealPath, true, getter_AddRefs(path));
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return Create(aGlobal.GetAsSupports(), path);
}
/* static */ already_AddRefed<Directory>
Directory::Create(nsISupports* aParent, nsIFile* aFile,
FileSystemBase* aFileSystem)
{
MOZ_ASSERT(aParent);
MOZ_ASSERT(aFile);
RefPtr<Directory> directory = new Directory(aParent, aFile, aFileSystem);
return directory.forget();
}
Directory::Directory(nsISupports* aParent,
nsIFile* aFile,
FileSystemBase* aFileSystem)
: mParent(aParent)
, mFile(aFile)
{
MOZ_ASSERT(aFile);
// aFileSystem can be null. In this case we create a OSFileSystem when needed.
if (aFileSystem) {
// More likely, this is a OSFileSystem. This object keeps a reference of
// mParent but it's not cycle collectable and to avoid manual
// addref/release, it's better to have 1 object per directory. For this
// reason we clone it here.
mFileSystem = aFileSystem->Clone();
}
}
Directory::~Directory()
{
}
nsISupports*
Directory::GetParentObject() const
{
return mParent;
}
JSObject*
Directory::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return DirectoryBinding::Wrap(aCx, this, aGivenProto);
}
void
Directory::GetName(nsAString& aRetval, ErrorResult& aRv)
{
aRetval.Truncate();
RefPtr<FileSystemBase> fs = GetFileSystem(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
fs->GetDirectoryName(mFile, aRetval, aRv);
}
void
Directory::GetPath(nsAString& aRetval, ErrorResult& aRv)
{
// This operation is expensive. Better to cache the result.
if (mPath.IsEmpty()) {
RefPtr<FileSystemBase> fs = GetFileSystem(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
fs->GetDOMPath(mFile, mPath, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
}
aRetval = mPath;
}
nsresult
Directory::GetFullRealPath(nsAString& aPath)
{
nsresult rv = mFile->GetPath(aPath);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
already_AddRefed<Promise>
Directory::GetFilesAndDirectories(ErrorResult& aRv)
{
RefPtr<FileSystemBase> fs = GetFileSystem(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
RefPtr<GetDirectoryListingTaskChild> task =
GetDirectoryListingTaskChild::Create(fs, this, mFile, mFilters, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
task->Start();
return task->GetPromise();
}
already_AddRefed<Promise>
Directory::GetFiles(bool aRecursiveFlag, ErrorResult& aRv)
{
ErrorResult rv;
RefPtr<FileSystemBase> fs = GetFileSystem(rv);
if (NS_WARN_IF(rv.Failed())) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
RefPtr<GetFilesTaskChild> task =
GetFilesTaskChild::Create(fs, this, mFile, aRecursiveFlag, rv);
if (NS_WARN_IF(rv.Failed())) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
task->Start();
return task->GetPromise();
}
void
Directory::SetContentFilters(const nsAString& aFilters)
{
mFilters = aFilters;
}
FileSystemBase*
Directory::GetFileSystem(ErrorResult& aRv)
{
if (!mFileSystem) {
nsAutoString path;
aRv = mFile->GetPath(path);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
RefPtr<OSFileSystem> fs = new OSFileSystem(path);
fs->Init(mParent);
mFileSystem = fs;
}
return mFileSystem;
}
} // namespace dom
} // namespace mozilla